Telephone Wiring Color Diagram Cat5e On The - work wiring instructions the t 568b standard is the most monly used the wiring diagram is shown with the hook clip on the underside the wall jack may be wired in a different sequence because the wires may be crossed inside the jack the jack should have a wiring diagram or designated pin numbers colors to match up to the color code below t 568b color code for rj 45 plug the illustration shown is for t 568b the pairs designated for 10baset ether are orange and green the other two pairs brown and blue can be used for a second ether line or for phone connections cat 5 wire pairs the four colors are in order blue orange green and brown thus when refering to the second pair of wires it is the orange pair regular phone cable consists of two untwisted pairs each with wires of a different solid color the first pair is green red the second is black yellow rj45 cat 5 cat5e and cat6 wiring diagram while. 568b is more mon than 568a you can use either one as long as the same scheme id used on both ends for a cross over cable use 568a on one end and 568b one the other end technical specifications for tia eia 568a 568b standards for cat5e cable the following diagrams look at the jacks from the front the wiring at the rear of the jack varies by manufacturer it may not be the same sequence as the front pliance with the color codes is maintained by routing the connections at the back to the proper sequence at ether cable plug rj45 pinout wiring color table for t568b the table below show the proper ether plug wiring with orientation of the colored wires to the pins for the cat6 cable we ll make ie the more mon t568b standard cable with a spine creating cat5e standard and crossover cables fan the wires out from left to right in the order they are to be crimped using the same color scheme 568a. or 568b at both ends will create a standard patch cable as shown in the 568a 568a and 568b 568b illustrations below with the wires the steps below show you how to install a new phone jack and make sense of the color binations note telephone wires inside your home carry a very low voltage electrical current and are safe to work on without shutting off the power doing your own telephone wiring note this page describes the phone wiring conventions in the united states i m not familiar with the phone wiring conventions outside the u s so the information here may not apply in your country